Nut-lock.



F. BUSHBY. NUT LUCK, APPLICATION FILED MAY 25, 1909.

51AM@ l Patnted Mar. 8, 1910;

me/Mofa FRANK BUSHEY, OF MUNISING, MICHGAN.

NUTJLOCK.

To @ZZ whom it may concern.'

Be it known that I, FRANK BUSHEY, a citizen of the United States,residing at Munising, in the county of Alger and State oi lllichigan,have invented certain new and useful Improvements in Nut-Locksg and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to nut locks.

The object ot the invention is to provide a cheap, efficient and readilyoperable nut lock.

Heretofore, many of the nut locks on the market were locked in positionupon the nuts or bolts and could not be disengaged therefrom, and it wasnecessary to break the nut oii ofthe bolt or to destroy the threadsthereo'l:l in order to release the bolt from engagement with the partsit secured. Iii' this was not the case, then usually, the nut lock hadto be destroyed or so mutilated that it could not be utilized again witheffectiveness.

It is the object of my invention to avoid these ditliculties and broadlyspeaking, consists in providing' a nut lock for machinery of all typeswhich may be readily disengaged from its locking position so that thebolt may be removed for repairs to the niachinery or for any othercause.

.ft still further object oi. the invention is the provision of a nutlock which will permit the bolt to be turned up into locking positionwhile the locking device is in engagement with the bolt but which willnot permit the unscrewing of the bolt or nut.

With these and other objects in view, the invention consists ot certainnovel features of construction, combination and arrangement of parts aswill be more fully described and particularly pointed out in the appended claims.

in the accompanying drawings, Figure 1 is a side elevation with partsbroken away; Fig. 2 is a top plan view showing' the pawl in retractedposition; Fig. 3 is a similar view with parts broken away, showing thepawl in locking position; Fie. 4L is a transverse sectional view on theline 4:*4 of Fig.

" 3; Fig. 5 is a transverse sectional view on the line 5 5 of Fig. 3;Fio. 6 is a detail perspective view of the pawl removed fromSpecification of Letters Patent.

Application filed May 25, 1909.

Patented ital. e, raie. Serial No. 498,236.

the nut; and Fig. 7 is a detail perspective view of the tool used foroperating the pawl.

Referring more especially to the drawings, 1 represents a lbolt ot theordinary charac ter having a head 2, and a threaded end 3, upon whichthe clamping nut 4t, is adapted to be secured. ln this instance, the nutemployed is cut away to form a table or shoulder 5, extending up fromwhich, at one corner of the nut, is a pivotal bolt or pin G, upon whichis pivoted a suitable pawl or locking dog having a projecting tooth 8,threaded to correspond with the threads ot' the nut. The tooth isbeveled on one face thereof as at 9, to form a stop which is adapted toengage a shoulder 10, upon the nut, to limit the inward movement of thepawl, The opposite side of the tooth is directly transverse to the boltopening through the nut, and thereby forms a cutting edge upon thethreads oi the tooth. Adjacent the tooth, there is formed a springreceiving notch 11, adapted to receive the operating end of a heavyleat' spring 12, which is secured in a slot 13, formed vertically in thenut and which is provided with an oitset adapted to receive the headedend 14, oi. the spring. As shown in Fig. 5, the spring is beveled on itstop edges and the metal of the nut is upset over the beveled portion soas to hold the spring from vertical movement in the slot, the headed endpreventing any longitudinal movement. The spring normally forces thethreaded tooth S, ot the dog into engagement with the threads of thebolt and in order to hold the tooth out of engagement: therewith, lprovide an extension iinger 15, on the dog 7, and having pivoted in itsbifurcated end a locking pawl 16, which is adapted to engage the wallsof a socket 17, sunk into the table 5.

In Fig. 7, l have shown a tool 18, with a bifurcated end 19, the legsoi" which are shouldered at 20, to engage over the pawl 16, so that itmay be forced downwardly into the socket 17. llt it is desired torelease the dog from engagement with the bolt, the finger and pawl 16,are engaged by the lever 18, and the dog forced over against the tensionot the spring, and the pawl 16, thrown into engagement with the socketso as to lock the dog in inoperative position.

It will be noticed that when the dog is in locking position, the boltmay be turned so as to be screwed into the nut but ,it may not be turnedso as to unscrew'it from the nut, owing to the fact that the points onthe tooth 8, bite into the threads on the bolt and make the pressureexerted thereon in a direct line with the pivot bolt 6.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation ogt' the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrilicing any of the advantages of this invention.

Having thus described my invention, what l claim is l. ln a device ofthe class described, a bolt, a nut carried thereon, a table formed onthe nut, a pawl pivoted on the table and having toothed engaging points,means for normally throwing said points into engagement with the bolt,means to limit the movement of said pawl in one direction, said nuthaving a socket formed therein, and means pivoted on the pawl forengaging the socket to lock the teeth out of engagement with the bolt. i2. In a device of the class described, al bolt, a nut threaded thereon,a table formed l on said nut, a pawl pivoted to move over said table,teeth formed on said pawl eX- tending diagonally toward the bolt fromthe longitudinal line of said pawl, said table having a socket formedtherein, and a member pivotally gaging the socket to hold the pawl outof engagement with the bolt.

3. ln a device of the class described, a bolt, a nut threaded thereon, atable formed on the bolt, a dog pivoted to move over the table, a lingeron the dog having a bifurcated end, a pawl pivoted in the biiiurcatedend of the tinger adapted to engage a socket to lock the dog ininoperati\f*e position, a

spring carried by the nut and adapted to .Y

engage the dog for normally throwing the same to operative position.vand a tooth extending diagonally trom the major axis of' said linger andhaving points formed thereon adapted to engage the threads ot the boltat f an angle thereto, whereby the bolt may bc turned to screw into thenut but may not be turned to unscrew from the nut.

In testimony whereof l have hereunto set my hand in presence ot twosubscribing witnesses.

his FRANK BUSHEY.

mark

Witnesses HENRY B. FREEMAN, BEssIE VENDiEN.

mounted on the pawl for en-

